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101 lines
5.0 KiB
HTML
101 lines
5.0 KiB
HTML
<div class="header">
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<div class="subTitle">
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javax.swing.tree
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</div>
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<h2 class="title" title="Interface TreeCellRenderer">Interface TreeCellRenderer</h2>
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</div><div class="contentContainer">
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<div class="description">
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<ul class="blockList">
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<li class="blockList">
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<dl>
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<dt>
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所有已知实现类：
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</dt>
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<dd>
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<span><a href="../../../javax/swing/tree/DefaultTreeCellRenderer.html" title="javax.swing.tree中的类">DefaultTreeCellRenderer</a></span>
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</dd>
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</dl>
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<hr/> <br/> <pre>public interface <span class="typeNameLabel">TreeCellRenderer</span></pre>
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<div class="block">
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<span>定义显示树节点的对象的要求。</span>
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<span>有关<a href="http://docs.oracle.com/javase/tutorial/uiswing/components/tree.html">实现</a>显示自定义图标的树状单元格渲染器的示例，请参阅<em>Java教程</em>中的How to Use Trees。</span>
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</div> </li>
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</ul>
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</div>
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<div class="summary">
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<ul class="blockList">
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<li class="blockList">
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<!-- ========== METHOD SUMMARY =========== -->
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<ul class="blockList">
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<li class="blockList"><a name="method.summary">
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<!-- --> </a> <h3>方法摘要</h3>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Method Summary table, listing methods, and an explanation">
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<caption>
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<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
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<span class="tableTab" id="t2"><span><a href="javascript:show(2);">接口方法</a></span><span class="tabEnd"> </span></span>
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<span class="tableTab" id="t3"><span><a href="javascript:show(4);">抽象方法</a></span><span class="tabEnd"> </span></span>
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</caption>
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<tbody>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Method and Description</th>
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</tr>
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<tr class="altColor" id="i0">
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<td class="colFirst"><code><a href="../../../java/awt/Component.html" title="class in java.awt">Component</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/swing/tree/TreeCellRenderer.html#getTreeCellRendererComponent-javax.swing.JTree-java.lang.Object-boolean-boolean-boolean-int-boolean-">getTreeCellRendererComponent</a></span>(<a href="../../../javax/swing/JTree.html" title="class in javax.swing">JTree</a> tree, <a href="../../../java/lang/Object.html" title="class in java.lang">Object</a> value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus)</code>
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<div class="block">
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将当前树状单元格的值设置为
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<code>value</code> 。
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</div> </td>
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</tr>
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</tbody>
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</table> </li>
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</ul> </li>
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</ul>
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</div>
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<div class="details">
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<ul class="blockList">
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<li class="blockList">
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<!-- ============ METHOD DETAIL ========== -->
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<ul class="blockList">
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<li class="blockList"><a name="method.detail">
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<!-- --> </a> <h3>方法详细信息</h3> <a name="getTreeCellRendererComponent-javax.swing.JTree-java.lang.Object-boolean-boolean-boolean-int-boolean-">
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<!-- --> </a>
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<ul class="blockListLast">
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<li class="blockList"> <h4>getTreeCellRendererComponent</h4> <pre><a href="../../../java/awt/Component.html" title="class in java.awt">Component</a> getTreeCellRendererComponent(<a href="../../../javax/swing/JTree.html" title="class in javax.swing">JTree</a> tree,
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<a href="../../../java/lang/Object.html" title="class in java.lang">Object</a> value,
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boolean selected,
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boolean expanded,
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boolean leaf,
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int row,
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boolean hasFocus)</pre>
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<div class="block">
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<span>将当前树状单元格的值设置为<code>value</code> 。</span>
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<span>如果<code>selected</code>为真，则将像选择一样绘制单元格。</span>
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<span>如果<code>expanded</code>为真，则节点当前被扩展，并且如果<code>leaf</code>为真，则节点表示叶，并且如果<code>hasFocus</code>为真，则节点当前具有焦点。</span>
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<span><code>tree</code>是<code>JTree</code>所述接收器被构造成用于。</span>
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<span>返回渲染器用来绘制值的<code>Component</code> 。</span>
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<p> <span><code>TreeCellRenderer</code>还负责渲染表示树的当前DnD丢弃位置的单元格，如果它有一个。</span> <span>如果这个渲染器关心渲染DnD放置位置，它应该直接查询树，看看给定的行是否代表放置位置：</span> </p>
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<pre> <span>JTree.DropLocation dropLocation = tree.getDropLocation();
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if (dropLocation != null
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&& dropLocation.getChildIndex() == -1
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&& tree.getRowForPath(dropLocation.getPath()) == row) {
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// this row represents the current drop location
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// so render it specially, perhaps with a different color
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}</span> </pre>
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</div>
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<dl>
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<dt>
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<span class="returnLabel">结果</span>
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</dt>
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<dd>
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渲染器用来绘制值的
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<code>Component</code>
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</dd>
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</dl> </li>
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</ul> </li>
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</ul> </li>
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</ul>
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</div>
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